A New York City high school principal has been accused of sleeping with a guard, an assistant principal and a parent on campus while classes were in session, and leaving incriminating photos of the trysts on department computers.

Annie Schmutz Seifullah, 35, was escorted from Robert Wagner Secondary School of Arts and Technology, in Long Island City, Queens, Thursday, where she was principal of the 7th-12th grade.

Detectives investigating the allegations seized computers and other electronics from her office and home, which, according to the New york Post, contained pictures of her wearing only lingerie and engaging in various sex acts including a threesome.

‘We are appalled by these disturbing allegations and acted swiftly to remove the principal while the matter is under investigation,’ a Department of Education spokesman told the Post.

‘This type of alleged behavior is completely unacceptable for any DOE employee.’

The newspaper reports that Seifullah’s antics were revealed after a romance with a student’s father came to a bitter end and the scorned lover turned over three department laptops he obtained while living with the principal.

The unidentified dad also gave investigators a video and audio tape in which Seifullah allegedly confesses to engaging in oral sex with an NYPD school-safety agent in the school security office.

She also admits to getting frisky with an assistant principal in a book-storage room during school hours, while he was visiting from another school.

‘I don’t know what I was thinking. I don’t know why I thought it was OK,’ she tells the angry father in the tape, after he accuses her of cheating.

‘You gave him [expletive] while my child was in the building,’ he yells in the recording, according to the Post.